This antenna by Delock allows the usage of the 2.4 GHz WLAN bands indoors. PIFA antennas (Planar Inverted F-Shaped Antenna) are particularly very flat antennas that can be integrated directly on the PCB.PIFA antennas (Planar Inverted F-Shaped Antenna) are particularly very flat antennas that can be integrated directly on the PCB. Specification https://elecena.pl/product/17872738/86183-wlan-antenna-mhf-4l-connector 2021-04-25 https://elecena.pl/product/17872738/86183-wlan-antenna-mhf-4l-connector 2021-10-17